CN112290371B - Laser beam combining system based on square optical fiber beam combiner - Google Patents
Laser beam combining system based on square optical fiber beam combiner Download PDFInfo
- Publication number
- CN112290371B CN112290371B CN202110000552.2A CN202110000552A CN112290371B CN 112290371 B CN112290371 B CN 112290371B CN 202110000552 A CN202110000552 A CN 202110000552A CN 112290371 B CN112290371 B CN 112290371B
- Authority
- CN
- China
- Prior art keywords
- square
- laser
- optical fiber
- fiber
- beam combining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
Abstract
The invention discloses a laser beam combining system based on a square optical fiber beam combiner, which comprises: sub-beam module, beam combiner, phase control module and laser detector, wherein the beam combiner includes again: the optical fiber protection device comprises a plurality of optical fibers, tail fibers, a glass tube and square optical fibers, wherein the tail fibers are arranged into a square array and are vertically connected with the square optical fibers, and the glass tube is sleeved on the peripheries of the tail fibers to play a role in protecting and strengthening connection. The laser beam combining system disclosed by the invention can realize a laser beam combining technology based on the optical waveguide self-imaging principle by a simple structure, the stability of the performance of the beam combining system is improved, the complexity of the laser beam combining system is reduced, the beam quality of the beam combined by the laser beam combining system is close to 1, and the beam combining efficiency is close to 100%.
Description
Technical Field
The invention belongs to the field of fiber lasers, and particularly relates to a laser beam combining system based on a square fiber beam combiner.
Background
The fiber laser has the advantages of high conversion efficiency, good beam quality, convenient thermal management, compact structure and the like, and is widely applied to the fields of industry, optical communication and national defense. However, the power of a single mode fiber laser cannot be increased infinitely due to the influence of factors such as thermal damage and nonlinear effect, and in order to obtain a high-power high-brightness laser source, a multi-path laser coherent synthesis mode is generally adopted to obtain high-power output laser. The existing fiber laser coherent synthesis technology can be divided into two types, namely a split aperture coherent synthesis technology and a common aperture coherent synthesis technology according to different beam combination modes of all laser subunits. The aperture-division coherent synthesis means that each sub-beam is output by a discrete aperture, a certain distance exists between the centers of each beam in a near field emission, and each beam in a far field emission is subjected to effective coherent synthesis; the common aperture coherent synthesis means that all sub-beams are emitted by a common aperture, the centers of all paths of beams are completely overlapped in the near field of emission, and finally one path of laser output is represented.
In the common aperture coherent synthesis technology, the synthesis technology can be classified into the following categories according to different principles: the optical waveguide fiber combiner comprises a polarization prism-based synthesis technology, a diffraction element-based synthesis technology, a fused biconical taper fiber combiner-based synthesis technology and an optical waveguide self-imaging principle-based synthesis technology. The synthesis technology based on the polarization prism realizes the coherent synthesis of a plurality of paths of light beams by utilizing a polarization beam combiner in a mode of level combined beam; the synthesis technology based on the diffraction element mainly utilizes the reversible principle of the light path, and the diffraction optical element is reversely used to realize the synthesis of the multi-path light beams, the two modes are that the optical fiber laser beams are converted into the space light beams, when the synthesized laser beams are increased, the number of the used space optical elements is increased, the complexity of a beam combination system can be greatly increased, the stability is poor, the heat dissipation problem is difficult to solve, and the heat management is inconvenient. The optical fiber combiner based on the fused biconical taper optical fiber bundle is characterized in that a plurality of optical fibers are placed in a glass tube to be tapered, the input optical fibers are tapered, and the fiber cores are gathered to realize coherent laser beam combination, although the complex degree of the system is reduced due to the full optical fiber structure, the combining mode is formed by tapering the plurality of optical fibers, so that side lobes inevitably occur to influence the quality and the combining efficiency of the combined light beam; the synthesis technology based on the optical waveguide self-imaging principle mainly utilizes the self-imaging effect, namely, multiple beams of input laser can be periodically imaged in the optical waveguide, the synthesis technology has the potential of completely eliminating side lobes, and the synthesis efficiency close to one hundred percent and the beam quality close to 1 can be realized in coherent synthesis, so the synthesis technology based on the optical waveguide self-imaging principle is the first choice of laser coherent combination.
The existing laser beam combining system mainly comprises three modules: the beam combining module of the laser beam combining system based on the optical waveguide self-imaging principle at home and abroad adopts a complex optical system space structure, namely, a plurality of beams of laser of the beam combining module are combined by using a space optical element after being arranged or collimated, for example, the laser is collimated by a space micro lens and then is driven into an optical waveguide device.
Therefore, a laser beam combining system is needed, which can implement a laser beam combining technology based on the optical waveguide self-imaging principle with a simple structure, and improve the laser beam combining quality and beam combining efficiency.
Disclosure of Invention
In view of this, the present invention provides a laser beam combining system, which is an all-fiber structure, can implement a laser beam combining technology based on an optical waveguide self-imaging principle, and has a simple structure, high beam combining efficiency, and good beam combining quality.
In order to achieve the purpose, the invention adopts the following technical scheme: the laser beam combining system comprises: the device comprises a sub-beam module, a beam combiner, a phase control module and a laser detector; the sub-beam module, the beam combiner and the laser detector are sequentially connected along the laser transmission direction, and the phase control module is respectively connected with the sub-beam module and the laser detector; the beamlet module comprises a plurality of optical fibers; the beam combiner includes: many tail optical fibers, glass pipe and square optic fibre, many tail optical fibers are the tail optical fiber of many optic fibres in the beamlet module, many tail optical fibers place in the glass pipe, and arrange for square array in the glass pipe, the fibre core cross-section of square optic fibre is divided into and is arranged a plurality of square subregion arrays of array unanimity with many tail optical fibers, many tail optical fibers are connected with square optic fibre is perpendicular, and the fibre core center of every tail optical fiber rather than the square subregion center coincidence of the square optic fibre core cross-section that corresponds.
Preferably, the square optical fiber has a length satisfying the optical waveguide self-imaging requirement.
Preferably, the size of the glass tube is adjusted according to the number of the tail fibers arranged in the glass tube.
Preferably, the structure of the square optical fiber is any optical fiber structure comprising a square core.
Preferably, the beamlet module includes, but is not limited to, a full fiber laser.
Preferably, the output laser beams of the plurality of pigtails are linearly polarized light in the same direction, are phase-locked, and output single-mode laser beams with the same power.
The invention has the beneficial effects that: the laser beam combining system disclosed by the invention can realize a laser beam combining technology based on the optical waveguide self-imaging principle by a simple structure, can eliminate the side lobe of a combined beam, has the beam quality close to 1 and the beam combining efficiency close to 100 percent, and replaces a complex space optical structure in the prior art by using an all-fiber system containing a square optical fiber, so that the laser beam combining system based on the optical waveguide self-imaging principle has a simpler structure and improves the stability of the beam combining system; in addition, the all-fiber beam combining system of the invention avoids the problem of heating of the fiber end face due to the fact that the fiber end face does not contact with the space, reduces the requirement of the beam combiner on a water cooling system, and is convenient for heat management.
The invention provides a brand new thought for the design of a laser beam combining system based on the optical waveguide self-imaging principle.
Drawings
FIG. 1 is a schematic structural diagram of a laser beam combining system based on a square optical fiber beam combiner according to the present invention;
fig. 2 is a spot diagram after being combined by the beam combining system based on the square optical fiber beam combiner of the present invention.
Detailed Description
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
The invention is described in detail below with reference to the figures and specific embodiments.
A laser beam combining system based on a square fiber combiner, the laser beam combining system comprising: the laser system comprises a sub-beam module, a beam combiner, a phase control module and a laser detector, wherein the sub-beam module adopts an optical fiber amplification stage and comprises a plurality of beams of optical fibers, the beam combiner coherently combines a plurality of laser sub-beams and outputs the combined laser to the laser detector, the phase control module detects the laser beams in the laser detector, and the sub-beam module is controlled through detection feedback to adjust the phase of the output laser.
The sub-beam module, the beam combiner and the laser detector are sequentially connected along the laser transmission direction, and the phase control module is respectively connected with the sub-beam module and the laser detector.
The beam combiner includes: the fiber core of the square optical fiber is divided into a plurality of square sub-area arrays consistent with the tail fiber arrangement array, the plurality of tail fibers are vertically connected with the square optical fiber, and the center of the fiber core of each tail fiber is superposed with the center of the sub-area of the square fiber core at the corresponding position of the tail fiber.
The length of the square optical fiber meets the requirement of optical waveguide self-imaging, and can be calculated according to a self-imaging principle formula and the section size, namely the length of the square optical fiber needs to ensure that a plurality of laser beams are coherently synthesized on the connecting surface of the square optical fiber and the detector to form a surface where an image point of one laser beam is located.
The size of the glass tube is adjusted according to the number of the tail fibers arranged in the glass tube, and the glass tube mainly plays a role in protecting and stabilizing the connection between the optical fibers.
The shape of the square optical fiber is not limited, and the square optical fiber is any optical fiber structure containing a square fiber core, such as a square fiber core and a circular cladding structure, or a structure in which a square fiber core is directly coated with a cladding layer.
The beamlet module is not limited to a full fiber laser and may be any laser including a multi-beam laser output fiber.
The output laser of the tail fibers of the plurality of sub-beam modules needs to be linearly polarized light in the same direction, the phase is locked, and the power of each light beam is the same.
Assuming that the refractive indices of the core and the cladding of the square optical fiber are respectivelyn 1 Andn 2 assuming that the optical field is incident on the square fiber from z =0, the eigenmodes of the laser waveguide will be excited in the fiber, and the linear superposition of these laser modes will constitute the field distribution on any cross section of the fiber. When the mode excited by the incident field is transmitted to any position z of the optical fiber, the field distribution and the field strength on the corresponding cross section are respectively as follows:
in the above formula
For the eigenmode field, in an ideal optical waveguide, the eigenmode field remains constant, as in equation (2)
Positive or negative when the absolute value is taken, i.e. it is
Is shown as
The power proportion of each mode in the optical waveguide, which is generally determined by the input field and the eigenmode field,
also positive or negative, taking the absolute value, i.e. after
Is referred to as
The power proportion of each mode in the optical waveguide,
refers to the eigenmode field of each order of guided mode,
、 
is the ordinal number of each mode of the order,
and
are respectively the first
And
the longitudinal propagation constant of the mode, the second term on the right side of the formula (2) is the product sum of mode fields with different mode field sequence numbers, and the cross term of mode field coherent superposition is calculated. When in use
(N is an arbitrary integer), phase factor
Is a constant, cross term
The distribution of the input field is reproduced at the position to form self-imaging of the input field, and the self-imaging process can periodically decompose the field distribution transmitted in the square optical fiber into a state of multiple optical field distribution and then synthesize the state of single-component field distribution, and the process is completely finished by self-organization adjustment of guided modes in the square optical fiber and is a coherent superposition process. According to the principle that the optical path is reversible, after a plurality of laser beams are injected into the square optical fiber from the multiple imaging position of the square optical fiber, the laser beams are combined at the incident position of the optical field, so that under the condition that the input fields meet certain conditions, the input fields are coherently superposed in the square optical fiber to form proper field distribution, and then the coherent combination of the plurality of laser beams is realized.
Example 1
In this embodiment, as shown in fig. 1, taking coherent synthesis of 4 optical fibers as an example, arranging the 4 optical fibers into a 2 × 2 array in a combiner, dividing a square optical fiber into 4 square sub-regions, vertically connecting the 4 optical fibers with corresponding regions in the square optical fiber, and ensuring that the center of an optical fiber and the center of the corresponding square sub-region are in contact with each otherThe heart coincides. The output light beams of the 4 optical fibers are combined by the square optical fiber beam combiner to obtain the quality M of the combined light beam2=1.16, the beam combining efficiency of the laser beam combining system is 99.3%, and it can be seen from fig. 2 that the beam combined by the present embodiment has no beam side lobe.
Example 2
In this embodiment, taking coherent synthesis of 9 optical fibers as an example, the 9 optical fibers are arranged in a 3 × 3 array, the square optical fiber is divided into 9 square sub-regions, the 9 optical fibers are vertically connected with the corresponding square sub-regions in the square optical fiber, and the center of the optical fiber is ensured to coincide with the center of the corresponding square sub-region. The output laser of 9 optical fibers is combined by the square optical fiber beam combining module to obtain the beam quality M of the combined beam2Less than 1.3, and the beam combining efficiency of the laser beam combining system is more than 99%.
In summary, it can be seen that the laser beam combining system disclosed in the present invention can implement a laser beam combining technology based on the optical waveguide self-imaging principle with a simple structure, the laser beam combining system has the capability of eliminating side lobes of a combined beam, and can implement a combined beam quality close to 1, and a combined beam efficiency close to 100%, and the beam combining system replaces a complex spatial optical structure in the prior art with an all-fiber system including a square fiber, so that the laser beam combining system based on the optical waveguide self-imaging principle has a simpler structure, and improves the stability of the beam combining system.
Claims (5)
1. A laser beam combining system based on a square optical fiber beam combiner is characterized by comprising: the device comprises a sub-beam module, a beam combiner, a phase control module and a laser detector; the sub-beam module, the beam combiner and the laser detector are sequentially connected along the laser transmission direction, and the phase control module is respectively connected with the sub-beam module and the laser detector; the beamlet module comprises a plurality of optical fibers; the beam combiner includes: the fiber core cross section of the square optical fiber is divided into a plurality of square sub-area arrays consistent with the arrangement arrays of the plurality of tail fibers, the plurality of tail fibers are vertically connected with the square optical fiber, and the center of the fiber core of each tail fiber is superposed with the center of the square sub-area of the fiber core cross section of the corresponding square optical fiber; the length of the square optical fiber meets the requirement of optical waveguide self-imaging.
2. The square fiber combiner-based laser beam combining system of claim 1, wherein the glass tube is sized according to the number of pigtails arranged inside.
3. The system of claim 1, wherein the structure of the square optical fiber is any optical fiber structure including a square core.
4. The square fiber combiner-based laser beam combining system of claim 1, wherein the beamlet module comprises, but is not limited to, a full fiber laser.
5. The laser beam combining system based on the square optical fiber beam combiner of claim 1, wherein the output laser beams of the plurality of pigtails are linearly polarized light in the same direction, are phase-locked, are single-mode laser beams, and have the same power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110000552.2A CN112290371B (en) | 2021-01-04 | 2021-01-04 | Laser beam combining system based on square optical fiber beam combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110000552.2A CN112290371B (en) | 2021-01-04 | 2021-01-04 | Laser beam combining system based on square optical fiber beam combiner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112290371A CN112290371A (en) | 2021-01-29 |
| CN112290371B true CN112290371B (en) | 2021-03-19 |
Family
ID=74425150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110000552.2A Active CN112290371B (en) | 2021-01-04 | 2021-01-04 | Laser beam combining system based on square optical fiber beam combiner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112290371B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422282B (en) * | 2021-08-24 | 2021-11-02 | 中国工程物理研究院激光聚变研究中心 | Preparation method of all-fiber self-imaging laser beam combiner |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7239777B1 (en) * | 2006-03-09 | 2007-07-03 | Lockheed Martin Coherent Technologies, Inc. | Method and apparatus to coherently combine high-power beams in self-imaging waveguides |
| US7406220B1 (en) * | 2006-03-09 | 2008-07-29 | Lockheed Martin Coherent Technologies, Inc. | Beam steering and combination |
| CN101237111A (en) * | 2007-04-23 | 2008-08-06 | 北京交通大学 | Active lock phase multi-fiber laser without external phase-adjusting part and interference bundle method |
| CN204065562U (en) * | 2014-09-26 | 2014-12-31 | 中国工程物理研究院流体物理研究所 | A kind of laser array beam combination system based on self-adaptation polarization and phase control |
| CN205159781U (en) * | 2015-10-29 | 2016-04-13 | 中国工程物理研究院激光聚变研究中心 | Laser spectrum power synthesis system |
| CN105759358A (en) * | 2016-01-22 | 2016-07-13 | 中国人民解放军国防科学技术大学 | All-fiber high-brightness single-mode fiber beam combiner and making method |
| CN106159653A (en) * | 2015-04-28 | 2016-11-23 | 中国兵器装备研究院 | A kind of multi-path large power optical-fiber laser synthesis output device |
| CN109818247A (en) * | 2019-01-30 | 2019-05-28 | 中国人民解放军国防科技大学 | Coherent combination phase control method and system for laser array |
| CN111585154A (en) * | 2020-05-18 | 2020-08-25 | 中国人民解放军国防科技大学 | Evaluation system and method for representing narrow linewidth optical fiber laser spectrum coherence characteristics in coherent synthesis system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009022164A1 (en) * | 2007-08-10 | 2009-02-19 | Bae Systems Plc | Improvements relating to photonic crystal waveguides |
| CN101383479A (en) * | 2008-09-28 | 2009-03-11 | 中国科学院上海光学精密机械研究所 | Two dimensional laser array phase locking and diameter aperture filling device |
| US10444526B2 (en) * | 2016-08-01 | 2019-10-15 | The Regents Of The University Of California | Optical pulse combiner comprising diffractive optical elements |
| CN108627983B (en) * | 2018-05-08 | 2020-04-17 | 清华大学 | Laser beam combining system and beam combining method thereof |
| CN110412769B (en) * | 2019-07-12 | 2020-06-23 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber laser beam combiner |
-
2021
- 2021-01-04 CN CN202110000552.2A patent/CN112290371B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7239777B1 (en) * | 2006-03-09 | 2007-07-03 | Lockheed Martin Coherent Technologies, Inc. | Method and apparatus to coherently combine high-power beams in self-imaging waveguides |
| US7406220B1 (en) * | 2006-03-09 | 2008-07-29 | Lockheed Martin Coherent Technologies, Inc. | Beam steering and combination |
| CN101237111A (en) * | 2007-04-23 | 2008-08-06 | 北京交通大学 | Active lock phase multi-fiber laser without external phase-adjusting part and interference bundle method |
| CN204065562U (en) * | 2014-09-26 | 2014-12-31 | 中国工程物理研究院流体物理研究所 | A kind of laser array beam combination system based on self-adaptation polarization and phase control |
| CN106159653A (en) * | 2015-04-28 | 2016-11-23 | 中国兵器装备研究院 | A kind of multi-path large power optical-fiber laser synthesis output device |
| CN205159781U (en) * | 2015-10-29 | 2016-04-13 | 中国工程物理研究院激光聚变研究中心 | Laser spectrum power synthesis system |
| CN105759358A (en) * | 2016-01-22 | 2016-07-13 | 中国人民解放军国防科学技术大学 | All-fiber high-brightness single-mode fiber beam combiner and making method |
| CN109818247A (en) * | 2019-01-30 | 2019-05-28 | 中国人民解放军国防科技大学 | Coherent combination phase control method and system for laser array |
| CN111585154A (en) * | 2020-05-18 | 2020-08-25 | 中国人民解放军国防科技大学 | Evaluation system and method for representing narrow linewidth optical fiber laser spectrum coherence characteristics in coherent synthesis system |
Non-Patent Citations (4)
| Title |
|---|
| 2-Dimensional Waveguide Coherent Beam Combiner;Scott Christensen等;《OSA》;20071231;第1页第1段至第3页第4段、图1-4 * |
| Coherent combination of high power fiber amplifiers in a two-dimensional re-imaging waveguide;Radoslaw Uberna等;《OPTICS EXPRESS》;20100609;第18卷(第13期);第1节第1段至第4节第2段、图1-7 * |
| Investigation of the thermo-optical behavior of multicore fibers used in coherently combined fiber laser systems;Steinkopff等;《SPIE》;20200221;第11260卷;第112600D-1~6页 * |
| 高功率光纤激光阵列被动相干组束技术研究;周军等;《光学学报》;20110930;第31卷(第9期);第0900129-1~9页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112290371A (en) | 2021-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8767790B2 (en) | System and method for generating intense laser light from laser diode arrays | |
| US5369661A (en) | Semiconductor laser-pumped solid state laser system and optical coupling system coupling semiconductor laser with optical fiber | |
| CN100546131C (en) | Multi-channel optical fibre laser coherence beam combination device and coherent beam combination method based on overlapping body grating | |
| US6289152B1 (en) | Multiple port, fiber optic coupling device | |
| CN101369716A (en) | High power light beam coupling semiconductor laser | |
| CN111665594A (en) | Optical connection structure | |
| CN112290371B (en) | Laser beam combining system based on square optical fiber beam combiner | |
| CN102820607B (en) | Signal and pumping laser hybrid integrated device | |
| CN108089267B (en) | A kind of optical-fiber type broadband light vortex converter | |
| US6603905B1 (en) | Launch port for pumping fiber lasers and amplifiers | |
| CN100561296C (en) | Laser mutual injection beam combination coupler | |
| CN102130416B (en) | Laser apparatus | |
| CN112636141B (en) | Self-adaptive spectrum synthesis system | |
| CN101369717B (en) | Multi-light beam coupling high power semiconductor laser unit | |
| CN104377550A (en) | High-power semiconductor laser device based on optical fiber light transmission beams | |
| CN213816730U (en) | Optical fiber coupling device of laser | |
| CN101615761B (en) | Coherent beam combination all-fiber laser | |
| CN113794098A (en) | High-light-beam-quality spectrum beam combining device | |
| CN114883898A (en) | Array distributed high-power all-fiber laser amplifier | |
| CN108803065B (en) | Dense optical fiber array spectrum beam combining device and method | |
| CN100589293C (en) | Active lock phase multi-fiber laser without external phase-adjusting part and interference bundle method | |
| CN105470792A (en) | High-power dual-core co-cavity optical fiber laser | |
| CN111965760B (en) | Low-loss OAM multiplexing and demultiplexing method and system using refraction device | |
| US8169693B1 (en) | Fiber bundle phase conjugate mirror | |
| CN116224603A (en) | Optical fiber array-based spatial light amplification device with spatial uniformity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |